### Feature/improvement Can you please add proper typescript types? The current ones are not usable, e.g.:  `Function` as type is just saying nothing. No return type, no arguments. This should be `(url: string) => Promise<void>`.
Feature/improvement
Can you please add proper typescript types? The current ones are not usable, e.g.:
Functionas type is just saying nothing. No return type, no arguments.This should be
(url: string) => Promise<void>.